This system is designed with the S4 4-piston caliper, which is paired with a 12-inch, one-piece slotted and drilled zinc-plated rotor. The S4 caliper comes equipped with D.O.T compliant dust and weather seals, and it utilizes the widely popular DR1 or HB100 pad type. One of the standout features of Baer's design is its unique backing plate, which not only serves as a caliper mount but also cleverly integrates a modern one-piece park brake shoe assembly. You’ll also find stainless braided hoses included for added durability. The 12-inch SS4 is compatible with most wheels that are 16 inches or larger. This system fits the 1994-2004 Ford Mustang (SN95) equipped with the OE Ford 8.8" Solid Axle.